Fix #9168 Initialize NullCookieJar with all options needed for KeyGenerator
Reverting 16f6f25 (Change behaviour with empty array in where clause)
Bump rack dependency to 1.5.2
Merge pull request #9196 from AndreyChernyh/fix-cookies-with-null-session

Fix #9168 Initialize NullCookieJar with all options needed for KeyGenerator
We don't need a CHANGELOG entry for an issue of something that was not released yet
Reverting e170014113 (Change behaviour with empty hash in where clause)
Add missing require to AP
Use IN operator like arel for empty hash in where clause
Merge pull request #9232 from robertomiranda/where-with-empty-hash

Use IN operator like Arel for empty hash in where clause
Update activerecord/CHANGELOG.md
Added notice message for destroy method in scaffold
Merge pull request #9233 from rahul100885/master

Added notice message for destroy method in scaffold
the `:controller` option for routes can contain numbers. closes #9231.
Merge pull request #9234 from senny/9231_no_numbers_in_route_namespaces_allowed

The `:controller` option for routes can contain numbers. closes #9231.
Prefer Ruby 2.0; require 1.9.3+
Improve img alt attribute for screen readers

Currently, the img_alt method in ActionView keeps underscores
in the alt attribute. Because underscores are pronounced in
Apple's VoiceOver Utility, this has serious implications for
accessibility. This patch makes underscored or hyphenated file
names (both common in projects) read more naturally in screen
readers by replacing them with spaces. See method documentation
for details.

Added documentation to image_alt method
added compress options for gzip

added test for compress options of gzip

update changelog
Merge pull request #7730 from beyond/gzip

added compress options for gzip
Update to latest Unicode data.

Release notes at: http://www.unicode.org/versions/Unicode6.2.0/
Remove method redefined warning

In `i18n` gem, the method definition of  `Hash#deep_merge!` is skipped
when it is already defined.

- warning: method redefined; discarding old deep_merge!